Piano-bench.



A. H. LANGE.

PIANO BENCH.

APPLICATION FILED r1112. 28, 1913.

2 SHEETS-SHEET 1.

Inventor W W By Jfiorneg A. H. LANGE.

PIANO BENCH.

APPLICATION FILED nmzs, 191a.

Patented May 5, 1914.

2 BHEETS-SHEET 2. 1 1 -4.

' [fiveni-or COLUMBIA PLANOORAPH COHWASHINUTON, D. O-

-tieal screw-shafts, 3, one in each pedestal,

AUGUSTUS H. LANGE, OF AMSTERDAM, NEW YORK.

PIANO-BENCH.

Specification of Letters Patent.

Application filed February 28, 1913.

Patented May 5, 191 1.

Serial No. 751,189.

To all whom. it may concern:

Be it known that I, AUeUsrUs H. LANGE, a citizen of the United States, residing at Amsterdam, county of Montgomery, and State of New York, have invented certain new and useful Improvements in Piano- Benches, of which the following is a specification.

The invention relates to such improvements and consists of the novel construction and combination of parts hereinafter described and subsequently claimed.

Reference may be had to the accompanying drawings, and the reference characters marked thereon, which form a part of this specification.

Similar characters refer to similar parts in the several figures therein.

Figure 1 is a view in front elevation, partly in vertical section, of my improved adjustable piano-bench. Fig. 2 is a top plan view of the same. Fig. 3 is a view of the same partly in end elevation and partly in vertical cross-section taken on the broken line 3-3 in 'Fig. 1. Fig. 4 is a view in elevation of the opposite end of the bench. Fig. 5 is a vertical cross-section of the bench taken on the broken line 55 in Fig. 1. Fig. 6 is a horizontal cross-section taken on the broken line 6-6 in Fig. 5.

The principal object of the invention is to facilitate the absolute and relative vertical adjustment of a main seat and an auxiliary seat of a piano-bench or the like.

Other objects will appear in connection with the following description.

Referring to the drawings wherein the invention is shown in preferred form, the base of the bench comprises a pair of hollow pedestals, 1, upon which is movably mounted a main seat, 2, by means of a pair of vereach of said screw-shafts fitting a nut, 4, fixed upon the pedestal.

Each screw-shaft, 8, is rotatively mounte'd upon the main seat, 2, by means of a bracket, 5, fixed upon the under side of the main seat, through'the lower end of which bracket a plain portion of the screw-shaft, 3, passes, the screw-shaft being provided at its upper end with a beveled gear, 6, and with a collar, 7 between which gear and collar the bottom wall of the bracket is confined, while rotative movement of the shaft, 3, is permitted.

A horizontal longitudinal shaft, 8, is rotatively mounted in bearings on the hangers,

9, depending from the main seat, said bearings permitting longitudinal sliding movement as well as rotative movement of said shaft.

Fixed upon the. shaft, 8, are beveled gears, 10, adapted to be moved into, andout of, engagement with the respective beveled gears, 6, by the longitudinal movements of the shaft, 8.

When the shaft, 8, is in position for the gears, 10, to engage the respective gears, 6, the main seat can be raised and lowered by rotati've movement imparted to the shaft, 8, by means of the hand-wheel, 11, fixed upon said shaft.

On the shaft, 8, near its outer end are col- .lars or flanges forming, peripheral grooves,

12 and 13, and mounted upon the outer end of the main seat is a spring-bolt or catch, 14, adapted to engage one or the other of said grooves.

The spring bolt can be released by upward pressure upon a thumb-piece, 15, permitting the shaft to be longitudinally moved to bring one or the other of the grooves,

1213 into'position to be engaged by the catch.'

lVhen the catch, 14:, is seated in the groove, 13, the gears, 10, .will be maintained in engagement with the respective gears, 6; and when the catch, 14, is in engagement with the groove, 12, the gears, 10, will be held out of engagement with the gear, 6, in

which position the shaft, 8, is inoperative to raise and lower the main seat.

An auxiliary seat, 16, is movably mounted upon the main seat by means of a nut, 17 carried by four legs, 18, depending from the auxiliary seat within a housing, 19, formed on the inner side of one of the pedestal-inclosing hollow legs, 2, depending from the main seat, which nut, 17 engages a vertical screw-shaft, 20, rotatively mounted and supported upon said housing by means of a bearing plate, 21, rigidly fixed upon said housing by'a pair of screw-actuated clamps, 22. The bearing-plate, 21, is embraced between a collar, 23, on the shaft, 20, below the plate, and a beveled gear, 24:, fixed upon said shaft above the plate. By rotating the shaft, 20, in opposite directions the nut, 17, will be caused to travel up and down along said screw-shaft, 6, raising and lowering the auxiliary seat relatively to the main seat.

As a means for rotating the screw-shaft, 20, at will, I slidably mount on the shaft, 8, a beveled gear, connected to rotate therewith and movable into, and out of, engage ment with the beveled gear, 24.

As a means for adjustably moving the beveled gear, 25, longitudinally of the shaft, 8, I have shown a slide-rod, 26, mounted in a longitudinal groove in the shaft, 8, and having a. projecting handle, 27, which rod has its inner end, 28, bent outward to engage the hub of the beveled gear, 25, thus serving to connect said beveled gear to rotate with the shaft, 8, as well as to slide the gear back and forth upon said shaft.

The handle, 27, of the rod, 26, is provided with three notches, 29, 30, and 31, severally adapted to receive a spring catch, 32, mounted upon the hand-wheel 11, and adapted to lock the rod, 26, in any one of three positions of longitudinal adjustment.

As shown in Fig. 1 the catch, 32, occupies the middle notch, 30, in the handle, 27 and the catch, 14, occupies the groove, 13, in the shaft, 8, with which adjustment of the several parts the gears, 10, and 25, are all in engagement with the respective gears, 6, and 24., and rotation of the shaft, 8, will cause simultaneous rotation of all of the screwshafts, 3 and 20, the result of which will be a vertical movement of the main seat and the auxiliary seat together, simultaneously with an additional or difierential movement of the auxiliary seat relatively to the main seat.

If the catch, 14-, be left in engagement with the groove, 13, and the rod, 26, be longitudinally shifted to cause the catch, 32, to on gage the notch, 29, the gear 25, will be held out of engagement with the gear, 24, in which case rotation of the shaft, 8, will cause both the main seat and the auxiliary seat to be vertically moved in unison, with no additional or differential movement of the auxiliary seat.

By shifting the shaft, 8, so that the catch, lt, engages the groove, 12, the gears, 10, will be held out of engagement with the gears, 6; and with the shaft, 8, in this position the rod, 26, can be shifted to cause the catch, 32, to engage the notch, 31, in the handle, 27, in which position the gear, 25, will be held in engagement with the gear, 2 1, and by rotating the shaft, 8, the auxiliary seat can be vertically adjusted relatively to the main seat, without any accompanying movement of the main seat.

iVhen the parts are so adjusted that the catch, 14, occupies the groove, 12, at the same time the catch, 32, occupies either the notch 29 or the notch 30, all of the gears will be disengaged and the shaft, 8, will be inoperative to change the height of either seat.

What I claim as new and desire to secure by Letters Patent is- 1. In a device of the class described, a base, a main seat vertically adjustable of said base, an auxiliary seat mounted upon and movable with and independently of said main seat, brackets depending from said. main seat, primary means carried in said brackets and engaging said base for elevating said main seat and said auxiliary seat siimiltaneously, actuating means supported in said brackets and movable with said main seat for operating said primary means, and secondary means supported in one of said. brackets and cooperative with said actuating means for elevating said auxiliary seat either differentially or independently of said main seat.

2. In a device of the class described, a base, a main seat vertically adjustable of said base, an auxiliary seat mounted upon and movable with and independently of said main seat, brackets depending from said mainv seat, prin'lary means carried in said brackets and engaging said base for elevat .ing said main seat and said auxiliary seat simultaneously, actuating means supported in said brackets and movable with said main seat and movable longitudinally into and out of engagement with said primary means, and a secondary means carried by one of said brackets and cooperative with said actuating means to elevate said auxiliary seat, differentially and simultaneously with the elevation of said main seat, and independently of the main seat when said actuating means is in inoperative position with respect to said primary means.

In a device of the class describcd,a base, a main seat vertically adjustable of said base, an auxiliary seat mounted upon and movable with and independently of said main seat, brackets depending from said main seat, primary means carried in said brackets and engaging said base for elevating said main seat and said auxiliary seat simultaneously, actuating means supported in said brackets and. movable with said main seat and movable longitudinally into and out of engagement with said primary means, means for locking said actuating means in either of op erative or inoperative positions, secondary means carried in one of said brackets and cooperative with said actuating means for elevating said auxiliary seat differentially with respect to said main seat when said actuating means is in operative engagement with said primary means, and independently of said main seat when said actuating means is in inoperative position with respect to said primary means, and means for disconnecting said secondary means from said actuating means.

i. In a device of the class described, a base section, a main seat vertically adjustable thereon, a secondary seat mounted upon and movable with and independently of said main seat, a pair of screw shafts provided with gear wheels threaded in said base for raising and lowering said main seat, a screw shaft and gear wheel carried by and movable with said main seat for independently raising and lowering the secondary seat, a rotatable shaft carrying gear Wheels and movable longitudinally to engage and disengage the gear wheels thereon with the gear wheels on the screw shaft, one of the gear wheels carried by said rotatable shaft having an independent longitudinal movement thereon, and means for moving said gear wheel into and out of engagement with the gear wheel on the screw s aft of the secondary seat independently of the movement of its supporting shaft.

5. In a device of the class described, a base section, a main seat vertically adjustable thereon, a secondary seat mounted upon and movable with and independently of said main seat, a pair of screw shafts carried by the main seat and movable in a longitudinal. direction with said seat, nuts carried by said. base with which said screw shafts engage, and bevel gears fixed on said screw shafts, a screw shaft and gear wheel carried by and movable with the main seat and threaded in a nut secured to the secondary seat for raising and lowering said seat, a main horizontal shaft journaled in the main seat and adapted to move therewith and to be moved longitudinally to a limited extent relatively to the main seat, and gear wheels carried by said shaft adapted to be moved optionally into engagement with the gear wheels of the screw shaft.

In testimony whereof, I have hereunto set my hand this 24th day of February, 1913.

AUGUSTUS H. LANGE.

Copies of this patent may be obtained for five cents each by addressing the Commissioner of Patents, Washington, D. G. 

